using System;
using System.IO;
using System.Collections;
using iTextSharp.text;
/*
 * $Id: PdfCopyFormsImp.java 3665 2009-01-26 22:32:15Z xlv $
 *
 * Copyright 2009 Bruno Lowagie (inspired by Paulo Soares)
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999-2009 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000-2009 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */

namespace iTextSharp.text.pdf {

    /**
    * Allows you to add one (or more) existing PDF document(s)
    * and add the form(s) of (an)other PDF document(s).
    * @since 2.1.5
    */
    internal class PdfCopyFormsImp : PdfCopyFieldsImp {

        /**
    * This sets up the output document 
    * @param os The Outputstream pointing to the output document
    * @throws DocumentException
    */
        internal PdfCopyFormsImp(Stream os) : base(os) {
        }
        
        /**
        * This method feeds in the source document
        * @param reader The PDF reader containing the source document
        * @throws DocumentException
        */
        public void CopyDocumentFields(PdfReader reader) {
            if (!reader.IsOpenedWithFullPermissions)
                throw new BadPasswordException("PdfReader not opened with owner password");
            if (readers2intrefs.ContainsKey(reader)) {
                reader = new PdfReader(reader);
            }
            else {
                if (reader.Tampered)
                    throw new DocumentException("The document was reused.");
                reader.ConsolidateNamedDestinations();
                reader.Tampered = true;
            }
            reader.ShuffleSubsetNames();
            readers2intrefs[reader] = new IntHashtable();
            fields.Add(reader.AcroFields);
            UpdateCalculationOrder(reader);
        }

        /**
        * This merge fields is slightly different from the mergeFields method
        * of PdfCopyFields.
        */
        internal override void MergeFields() {
            for (int k = 0; k < fields.Count; ++k) {
                Hashtable fd = ((AcroFields)fields[k]).Fields;
                MergeWithMaster(fd);
            }
        }

    }
}